Reamer cutter mounting means



Feb. 13., 1940. A C. CATLAND v 2,190,350

BEAMER CUTTER MOUNTING MEANS Original Filed Nov. 18, 1958 Patented Feb. 13, 1940 AUNITED BEAMER `CUTTER MOUNTING MEANS Alfreclll.` Catlanll,` Alhambra, Calif., assignor. 'to l .Globe Oil'Tools Company, Losd-Nietos, CaliL, a corporation of, California f original applitalianiv November-18, '1938, serial No.

241,205. Divided and this i 10, 1939,* Serial No; 260,973

application March y VThisinventionvrelatesto well ldrilling tools andv relates more particularly `to cutting means for rotary well reamers. A general object of' this invention is to providesimpla'practical anddependable means for rotatably supporting the' 'cutters of rotary well reamers.

This application is a divisionof my copending application Serial No. 241,205, led November 18', 1938. v

' Another object of this invention vis to' provide a well reamer structure in which the cutters and their anti-friction bearing means are in the nato `handle and ship and easy to install.

Another object of this invention Lis to provide a reamer `cutter assembly or 'unit embodying va 'novel anti-friction bearingr means `operable 'to transmit end thrusts orakial thrusts inl both directions.` `It hasbeen found in` the actual foperation. -of rotary well"reamers` th'at the cutters arel often subjected to down thrusts as wellas upward thrusts'. The bearing means fortypical rotary well reamer cutters embodyantiffriction ture of permanently assembled units convenient bearings for the transmissionof'.{the i upward 'thrusts on thecutters, but do inot have'fan'tir friction bearing means for takingthe 'downward thrusts that may be imposed on thev cutters.' The cutter unit of the present invention embodies' .a novel dependable anti-friction bearingfmeans adapted to'assume both the upward "and downward thrusts'imposed on thecutterfsajl` Another object of t is invention is to provide a well reamer cutter and bearing assembly that cannot be disassembled or tampered with in any way after it has beeny kcorrectly'assembled'at the'place of`manufacture. f

. Another object of this invention isk to provide a cutter and bearing assemblyy voithe character referred to that is simple and inexpensiveto manufacture and that embodies a minimum'nulli',

bervofsimplersturdy parts. The various object'sfan'd 'features yof rn'yinven.- tion willv be -fully understood Ifrom the4 following detailed description of 'a ltypical *preferred `vform and lapplication of 'the"invention, throughout which description reference is` made'to the accompanying drawing, inwhich:

Fig.'1'is a yfragmentary'.vertical, detailed 'sectional `View of a portion off a well reamer em-'l bodying lfthe improved cutter assembly or unit ofthe invention and Figs. 2 and'3` are enlarged lhorizontal detailed sectional views taken as indicated by linesZ-J` Land 3 3, respectively,-Tonl f Fig. 1..l

l The vpresent invention vmay be embodied in cute* ter units for use on reamers, etc., varying considerably in yciu'istruction and design and the cutter units maybe v secured to the well tools in any convenient or practical manner.` In the drawingI have shown the invention embodied in a rotary cutter unit or assembly for a typical well' reamer. While I` have illustrated only one cutter assembly applied to the reamer it is to be' understood that the reamer may embody a `pluralityof cutter units of like construction.

The portion of thereamer body yI!! illustrated in Fig. 1 is" provided at its peripherywith a vertically extending recess II` forreceiving a cutter.

The inner wall ofthe recess II may be concave while` the upper and lower ends of the recess are preferably at and horizontal. Radial or lateral sockets I2 are provided in the reamer body I ab'ov`e`and, be1owthe recess I I. The sockets I 2 connect withor join `the recess I I at the upper andv'lowerv walls ofthejrecess The improved cutter assembly of vthe presen invention may be saidto comprise, generally, a.

rotatable cutter I3, a cutter supporting pin I4, and anti-friction bearin-g means `I5 rotatably supporting the cutter I3 on the pin I4. i

drical*membendesigned to rotate about its longitiidinal axis. g The lower portion of the cutter I 3 `may be tapered or irusto-conicalr` The, periphery `ofthe cutter I3 is provided with `cutting means or cutting parts.v These cutting parts maybe in thev nature of vlongitudinally extending teeth I6. The teeth I'B may be straight, axial teeth or'may be spiralled. As illustrated in the drawing vvthe teeth I6 may extend lbetween the upper and'lowerfends of the cutter I3'l The ends ofthe cutter I3 may be. hat and horizontal.v Ihe elled olf as at I 'Ir In 4accordance with the invention a' central longitudinal opening I8 extends through the'cu'tter I3 from .one end to the other. A boreorsocket Id of enlarged diameter is vprovided inthe upper portion ofthe cutter I3 to upper outer corner of the cutter 'I3 maybe bevjoin the opening I8. The socket I9 is cylindrical and is vconcentric vwith the cutter` openingl I8.

The opening I8 is preferably cylindricaland uniform in diameter, as illustrated.y

" the reamer body I0, as will be later described.

" The anti-friction Ybearing means I5 supports Theipin It is" an elongate rodv or ysli-aft :for y 20 is permanently and integrally connected with.'- the cutter I3 so that it cannot .bel removed-at...

the well or in the field. An annular weld 2'I integrally joins the ring 20 withthe'cutter I3? The weld 2| is provided at the upper endfof .the 'ring r 29. The upper outer corner of the ring 20 may be bevelled off to provide arr-.annularA space for yre-` ceiving the weld 21|.

The anti-friction bearing means I5 further in;` v

cludes bearing elements for .transmitting axial thrusts between the cutter I3 and the' pin I4. An annularv bal-lrace .22is provided in thepin I4 and is vlocated to `have its .central-horizontal.. axis either slightly below or slightly-above the plane occupied .bythe bottom wall. of the-socket I9. A ball race 23 is provided to-surround andregis. ter= with the race22. The race 23 is partly` formed in the: lower inner corner ofthe vring 20 andpa-rtly formed in thev cutter I-3where. its opening I8 joins the socket IIB.y The-arcszof" curvature of the ball-races22. and'23 are substantially 180 in extent so. thatzthe .registering races: provide-an annular space thatv is'cylindricalin cross section. Aseries of balls 24 .occupies the registering races 22 and 23:. The` balls.. 24 .cooperating with .the races 22 and l2l3..operate to transmit bothzthe upward andthe downward axial thrusts and, of course. assist in thev transmission` of ltheradial loads imposed on thecutter I3.` It..will be observed that. the-.series of balls 24 .is located in the upper portion of the cutter I3jto support the upper part of the'.y cutter for. rotation.

The bearing means I5 further providesy or includes vertically spaced annular grooves 25'in the pin I4. Inthe construction illustrated there'are two spaced grooves 25, one located substantially midway between the. ends. ofA the cutter I3 and one located in the lower portion of the cutter -I3. The grooves 25 may be plain.cylindricalgrooves with flat upper land lower walls.. vSeries of antifriction rollers 26 occupythe grooves. 25. The rollers .26 are designed to. engage. the inner walls of the grooves25 and yto cooperate with. the.wall of the cutter opening I8 =totransmit the radial thrusts from the cutterto-the pin..|4. Itis to be understood .that the cutter I3 may be 4entirely 4supported on the pin I4 .by the balls 24 and the rollers 2B. Accordingly, the. cutter I3 may rotate with a minimum of friction duringr operation. of the rearner.v

The `cutter assemblydescribed above may. be secured to the reamer body- II)A in. any selected or preferred manner. In. the case illustrated the cutter assembly is. securedto the lreamer body I9 by attachingA means of the character `fully described andclaimedin my zo-pending application referred to above. The attaching .means includes blocks Z'Ifappliedtothe projecting upper and lower portions offthe cutter pin I4. The. blocks 21 have vertical` openings 28 receiving the upper and lower parts of the pin I4. The'blocks 2l are designed to occupy the sockets I2 in the reamer bodyy Ill. Horizontal openings 29 -in the blocksv 2. receive screws 39 whichare threaded into sockets. 3I in the. body- I-Il` to attach the blocks 21g-to the body... The openings29 intersect or join the openings 28 and the opposite ends of the cutter supporting pin I 4have notches 32 for receiving the attaching screws 30;

Thel heads 33 of the screws 30 are received in the f openings 29. and the notches 32 and are provided at their peripheries with knurling or teeth 34. Locking" pins` 135.-.are passed through horizontal..

`openings in the'blocks 21 and cooperate with thel f teeth 34 to prevent unthreading of the screws 30.* Tl'ie screws 30 in addition to attaching the blocks 21. to ythe' bodyffl .cooperate with the notches-32 "e to holdV the pin I4 against rotation and` longi-f f In assembling thecutter unit of the inventiorrf.

the-rollers 26are first inserted in their grooves 25l and are temporarily secured in thegro'oves by stiff grease, orrtheflike. The pin I4 carrying 'the d Arollers .26 is theninserted in the opening'IS of the cutter I3 and is brought to a position where l l the race'22substantially registers with'the portionof thezrace23.*.provided-inthewall of the openingf-I...v Thefballs=f24fav are then.. entered; throughthe. socket` .I9 totheirpositions inthe race'22andithe .partvof the race -23 in` the'cutter I3... vWhen thev balls- 24-have been arrangedin operating .,with the` --races on the pin. I4 .andfwhenthelweld A2 I yhas been formed the fba-lls 1serve to preventremovaloffthe cutter from-thepin I4.v lAccordingly .the cutter I3 and .its mounting orbearing means may bev shipped.andinstalled'asa unitwithout further adjustment #ormanipulation. The; assembly or unitmay be... correctly. assembledfatfthefplace of I manufacture .with the assurance -that the cutter I3 ywill be `correctly. and..dependably supported.'

wheninstalledon thereamer.. It will beappar-y l t l v enthow the blocks. 21v may be applied tothe end.V U portions ofthe. pin. |4 and....thenvinsertediin v'the 21.5`

sockets I2 for attachment/inthe body II] bylthe screws 30.' 'y

In 'the operation of the=tool.for rearner the cutter I3 projects from the,` bodyA Ill .and acts on the wall ofthe Well to ream the same. This en-l gagementof thev cutter I3. withthe-w'ell wall causes rotation of. the cutter. I3-about itslongi-f tudinal axis.

rotation. vTlie balls `24 cooperating with-the races 22 and 23 are operable totransmitvertical thrusts inboth directionsmaking-it:unnecessaryk to ern-y ploy thrust washersatthe endsof the cutter I3.

Accordingly.the. ends of4thecutter .I3 may. be clear or free of. end supports,y asillus'trated in Fig.

the radial thrusts. The spacedseries-of rollers 26. effectively` transmit the heavy` lateral or radialr I d I thrusts imposed on thecutter.I1-3:4

. Having. described onlya typical preferred formi to be limited or restricted tothe specific details herein set forth,`.b ut wish to .reserve to myself any variations or modifications that4 may' appear to those skilledrin. thel art or fall.v within scope 'of the followingclaims: d n Havingdescribed my. invention, I claim:` n

Athe

The..series.--of ballsZ4-andthe-l spaced'series of.. rollers 26` dependably support the cutterY I3 .at longitudinally spaced zones forfreef` eo f. 1.. The balls 24 also assist in4 the transmission of "65.-` and application of -my'inventionz` Ix'do-notwish ter, the pin having an annular ball race, one end a socket, a` pin passing through the opening, the

pin having an annular ball race, and spaced annular grooves, rollers in the grooves engaging the Wall of said opening to assist in supporting thev cutter on the pin, a ring arranged in the socket,`

there being an annular ball race formed in the ring and the adjacent part oi the cutter to op- `pinin bothdirections.

3. A reamer cutter assembly comprising a yand having. an annular pose the rst named race, la weld securing the -ring to the cutter, and balls in the saidy races transmitting endv thrusts betweenv the cutter larid reamer cutter having a longitudinal opening, one end portion of the opening being enlarged to Aform a socket, a pinpassing through the opening, the

pin having an annular ball race, a ring in the socket, therebeing an annular ball race formedin thering and the adjacent part'of the cutter to oppose the vfirst named race, balls in the races transmitting end thrusts between the cutter and `pin in both directions, and welding securing the ring to the cutter. i

4. Acutter assembly for a. Well tool comprising an elongate cutter having a longitudinal opening,

an end portion of the opening being enlarge'dlto form a socket,a pinv passing through the opening ball race, balls in v said race.a ball race on the wall. of the opening Where it joinsthe' socket cooperting -with the balls for the transmission ofv end thrusts from the cutterv to the pin in one direction, a member secured in the socket,..and a ball race on the member coop.- yerating with theballs for the transmission of end thrusts .from direction. f Y 5. Acutter assembly for a well tool comprising the cutter to the pin in the other an elongate cutter having a longitudinal opening, anrend portion of the opening being enlarged to form asocket, a pinpas'sing throughthe open--y and. transmitting eri` ing and having an" annularhall race, bearing Vmeans spaced :from said socketv transmitting radial thrustsv fronrthe cutter to the pin, balls;v in said race, abal'l race on the wall oi the openj ing where it joins-the socketfcooperating with the 'balls for the transmission .of endthrusts from the cutter to the pin iri'one direction, a member secured in the socket; and a. ball race on. the memthe other direction'. p v

6. A cutter assembly for a well tool comprising an elongate cutter having a longitudinal opening,

an end portion of theopening being enlarged to 'form a. socket, a pin passing through the opening and having an annular ball race, spacedA sets of anti-ifriction` elements engaged between the pin i and thev interior of the. cutter at points spaced from the socket for. transmitting thrusts from the cutter to the pin, balls in. said race, a ball race on the Wall of the opening where it joins they .socket cooperating with the balls for the transl mission of end thrusts from the cutter to thepin in one direction, a member securedin the socket,

, and a ball race on the member cooperating. with the balls for the transmission of end thrusts from the cutter to the pin in the `other direction. y

7. A cutter assembly for a Well tool comprising a roller cutter having a longitudinal opening and a socket in one endportion, a pinl lextending ber cooperating Withthe balls for the transmission'fof end. thrusts from the cutter to thel pin` in l0 cutter, roller bearing means/in the other end por.

tion of thecutter rotatably supporting-the cutterV the wau of the open,`

- on. the pin, a ball race in. the pin at the socket, f

balls in the race, a race on ving at the socket'cooperating with the balls for the transmission of end thrusts in. one directiom a member fixed in thesocket, and a race onthe member cooperating with the ballsffrorthe transmission of end thifjusts in theother direction..

8. A cutter 'assemblyl for a well tool comprising' a cutter having a longitudinal opening, a pin pass ing through the opening and having a ball` race-j adjacent an end of the cutter, a series of ballsv in` ythe race, airace on the wall of the opening coop-'- erating with the balls for the transmission of end thrusts in one direction, a member attached to the cutter, and a race on the member cooperating .l l with the balls for the transmission of endthrusts in the other direction. l y ALFRED C..CA'1'1 '.AND. 'A

3o4` through. the opening and projecting fromthe 

